Soap bar holder



FIG. 1 is a front, bottom perspective view of a soap bar holder showing my new design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a side elevation view thereof;

FIG. 4 is a top plan view thereof; and

FIG. 5 is a bottom plan view thereof. 

The ornamental design for a soap bar holder, substantially as shown and described. 